diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 3b4889e29..0dc90f4f3 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -27,7 +27,7 @@ jobs:
     - name: Set mamba environment "test"
       uses: mamba-org/provision-with-micromamba@main
       with:
-        environment-file: docs/ghp_environment.yaml
+        environment-file: docs/ghp_environment.yml
         environment-name: xtensor-doc
 
     - name: Run doxygen
diff --git a/readthedocs.yml b/readthedocs.yml
index 2554fc33f..03c0ad19a 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -1,2 +1,2 @@
 conda:
-  file: docs/rtd_environment.yaml
+  file: docs/rtd_environment.yml